HRID248248

反应详情

EQUATION

反应方程式

HRID 248248 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

To a solution of 17-ethyl-1-hydroxy-12-[2'-(3",4"-dihydroxycyclohexyl)-1'-methylvinyl]-23,25-di-methoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone (200 mg, Example 38) in ether (6 ml) is added borontrifluoride etherate (10 μl) followed by freshly prepared diazoethane (100 fold excess). The mixture is stirred at room temperature for 15 min and quenched with sat'd aqueous sodium bicarbonate solution. The organic layer is separated, washed (sat'd aqueous NaCl) and dried over anhydrous magnesium sulfate. Removal of solvent followed by preparative tlc on silica to separate the regioisomers gives the title compound.

WORKUP

后处理

  1. customquenched with sat'd aqueous sodium bicarbonate solution
  2. customThe organic layer is separated
  3. washwashed (sat'd aqueous NaCl)
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customRemoval of solvent
  6. customto separate the regioisomers